Study Fails to Find
If Silicone Implants
Cause Disorders

a Wall Street Journal Staff Reporter

Updated Oct. 6, 2004 12:01 a.m. ET

WASHINGTON -- After more than a decade, researchers at the National Cancer Institute failed to answer definitively the question of whether silicone breast implants may cause certain connective-tissue disorders.

The federal agency had been looking at the issue since 1992, when questions about the devices first appeared and the Food and Drug Administration restricted their use to women in controlled clinical trials seeking breast...